I tried it today without a bag and I have to admit, after some time my foot hurts, although I used high boots. My aim was a bit less precise since it's a new stance; training will help, but that is the big problem for me. With the bag under my ankle I could shoot 20 Targets before my foot got numb, now I have only 5 shots before it hurts to much. Effective training is not possible for me without an ankle support.
Howbeit, if I come to UK I will use this: http://fun-sport-vision.com/dpshop_g...lack_gross.jpg